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.\" ========================================================================
.\"
.IX Title "SSL_CTX_set_quiet_shutdown 3"
.TH SSL_CTX_set_quiet_shutdown 3 "2019-12-20" "1.0.2u" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.if n .ad l
.nh
.SH "NAME"
SSL_CTX_set_quiet_shutdown, SSL_CTX_get_quiet_shutdown, SSL_set_quiet_shutdown, SSL_get_quiet_shutdown \- manipulate shutdown behaviour
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
\&
\& void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode);
\& int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx);
\&
\& void SSL_set_quiet_shutdown(SSL *ssl, int mode);
\& int SSL_get_quiet_shutdown(const SSL *ssl);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBSSL_CTX_set_quiet_shutdown()\fR sets the \*(L"quiet shutdown\*(R" flag for \fBctx\fR to be
\&\fBmode\fR. \s-1SSL\s0 objects created from \fBctx\fR inherit the \fBmode\fR valid at the time
\&\fBSSL_new\fR\|(3) is called. \fBmode\fR may be 0 or 1.
.PP
\&\fBSSL_CTX_get_quiet_shutdown()\fR returns the \*(L"quiet shutdown\*(R" setting of \fBctx\fR.
.PP
\&\fBSSL_set_quiet_shutdown()\fR sets the \*(L"quiet shutdown\*(R" flag for \fBssl\fR to be
\&\fBmode\fR. The setting stays valid until \fBssl\fR is removed with
\&\fBSSL_free\fR\|(3) or \fBSSL_set_quiet_shutdown()\fR is called again.
It is not changed when \fBSSL_clear\fR\|(3) is called.
\&\fBmode\fR may be 0 or 1.
.PP
\&\fBSSL_get_quiet_shutdown()\fR returns the \*(L"quiet shutdown\*(R" setting of \fBssl\fR.
.SH "NOTES"
.IX Header "NOTES"
Normally when a \s-1SSL\s0 connection is finished, the parties must send out
\&\*(L"close notify\*(R" alert messages using \fBSSL_shutdown\fR\|(3)
for a clean shutdown.
.PP
When setting the \*(L"quiet shutdown\*(R" flag to 1, \fBSSL_shutdown\fR\|(3)
will set the internal flags to SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN.
(\fBSSL_shutdown\fR\|(3) then behaves like
\&\fBSSL_set_shutdown\fR\|(3) called with
SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN.)
The session is thus considered to be shutdown, but no \*(L"close notify\*(R" alert
is sent to the peer. This behaviour violates the \s-1TLS\s0 standard.
.PP
The default is normal shutdown behaviour as described by the \s-1TLS\s0 standard.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBSSL_CTX_set_quiet_shutdown()\fR and \fBSSL_set_quiet_shutdown()\fR do not return
diagnostic information.
.PP
\&\fBSSL_CTX_get_quiet_shutdown()\fR and SSL_get_quiet_shutdown return the current
setting.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBssl\fR\|(3), \fBSSL_shutdown\fR\|(3),
\&\fBSSL_set_shutdown\fR\|(3), \fBSSL_new\fR\|(3),
\&\fBSSL_clear\fR\|(3), \fBSSL_free\fR\|(3)
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